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Optical device

a technology of optical devices and weight balance, applied in the field of optical devices, can solve the problems of low resolution, inability to properly view 3d images, and weight of viewing devices, so as to improve the comfort of wearing optical devices, optimize weight balance, and optimize the effect of weight balan

Active Publication Date: 2016-02-09
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention improves the balance of weight in optical devices, such as active stereoscopic image viewing devices and variable focus eyeglasses, by using a secondary battery in a power source unit. This optimization is achieved without compromising the design of the optical device and improves the comfort of wearing it. The cylindrical or rectangularly shaped battery can be placed near either the rear end of a temple or in an earpiece, minimizing any impact on the overall weight of the device.

Problems solved by technology

Accordingly, in the passive system, 3D images in some cases could not be properly viewed unless the images are viewed generally in front of the display device.
Moreover, since the right-eye and left-eye images are displayed on one screen at the same time, the resolution is low.
However, in the active system, the viewing device is required to include liquid-crystal optical shutters and a power source for driving them, so that the viewing device becomes heavier and bulkier than normal eyeglasses.
Therefore, many users feel discomfort with wearing the viewing device.

Method used

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Examples

Experimental program
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Effect test

example 1

[0111]Glass Lenses with a weight (7 g each) equivalent to liquid-crystal optical shutters were prepared. A lithium-ion secondary battery having a diameter of 3.5 mm, a length of 35 mm, a weight of 0.8 g, and a battery capacity of 40 mAh was prepared. A resin composition corresponding to a charge / discharge circuit having dimensions of 28.0×3.0×1.2 mm and a weight of 0.15 g was prepared; and a resin composition corresponding to a driver circuit having dimensions of 5.0×80.0×3.0 mm and a weight of 3 g was prepared. The weight of each resin composition was adjusted by including an appropriate amount of metal material in rigid resin.

[0112]A resin eyeglass frame in which each temple had a length of about 10 cm and a width (height) of about 7 mm; each earpiece had a length of about 3.8 cm and a width (maximum) of about 7.3 mm; the total length of the temple and the earpiece (the direct distance between the center of a hinge shaft and the tip of the earpiece) was about 13.5 cm; and the tota...

example 2

[0116]A center-of-gravity position in the front-rear direction of the eyeglasses was obtained in the same manner as in Example 1 except that resin piece B combined with the secondary battery and resin piece C had centers of gravity at 9.5 cm from the front edges of their respective temples. The obtained center-of-gravity position was at 3.4 cm from the front edge of the temple, equivalent to 25% of the total length of the temple and the earpiece.

example 3

[0117]A center-of-gravity position in the front-rear direction of the eyeglasses was obtained in the same manner as in Example 1 except that resin piece B combined with the secondary battery and resin piece C had centers of gravity at 11 cm from the front edges of their respective temples. The obtained center-of-gravity position was at 4.1 cm from the front edge of the temple, equivalent to 30% of the total length of the temple and the earpiece.

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Abstract

Disclosed is an optical device which includes: optical components configured to be electrically actuated such that light transmission states are variable; a driver circuit for the optical components; a power source unit for driving the optical components; rims for supporting the optical components; temples having front and rear ends and connected at the front ends to the rims; and earpieces formed at the rear ends of the temples. The power source unit includes a secondary battery, and a charge / discharge circuit for controlling charge and discharge of the secondary battery. The secondary battery is provided near the rear end of the temple or in the earpiece.

Description

RELATED APPLICATIONS[0001]This application is the U.S. National Phase under 35 U.S.C. §371 of International Application No. PCT / JP2011 / 003341, filed on Jun. 13, 2011, which in turn claims the benefit of Japanese Application No. 2010-148434, filed on Jun. 30, 2010, the disclosures of which Applications are incorporated by reference herein.TECHNICAL FIELD[0002]The present invention relates to optical devices, more specifically to a technology for improving the comfort of an optical device with a built-in battery to be worn on the head of a user.BACKGROUND ART[0003]Some stereoscopic image viewing devices (simply referred to below as viewing devices) generally called 3D eyeglasses or 3D glasses support active system and some support passive system.[0004]In the active system, a right-eye image and a left-eye image are displayed on a display device, such as a television, while being alternatingly switched therebetween. On the other hand, on a viewing device, liquid crystal shutters or suc...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G02F1/1335H04N13/04G02C11/00G02B27/22G02F1/29
CPCG02B27/2264G02C11/10H04N13/0438G02F2001/294H04N2213/008G02B30/24G02F1/294H04N13/341G02F1/13G02B30/00
Inventor KAKINUMA, AKIRAYONEDA, KEISUKEKATO, FUMIO
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD